<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

    <div id="app">
        <!-- <button v-on:click="count=count-2">-</button>
        <button @click="count--">-</button>
        <span>{{count}}</span>
        <button v-on:click="count++">+</button>
        <button v-on:mouseenter="count++">+</button> -->
        <button @click="fn">切换显示隐藏</button>
        <h1 v-show="isShow">程雨欣</h1>
        
    </div>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.7.16/dist/vue.js"></script>
    <script>
        const app=new Vue({
            el:"#app",
            data:{
               count:100,
               isShow:true,
            },
            methods: {
                fn () {
                    //让提供的所有methods中的函数，this都指向当前示例
                    // console.log("执行了fn",app.isShow)
                    // app.isShow=!app.isShow;
                    this.isShow=!this.isShow

          
                }
                
            }
        })
    </script>
</body>
</html>